package com.wxg.netty.webchat;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

public class WebSocketChatServer {

    private int port;

    public WebSocketChatServer(int port) {
        this.port = port;
    }

    public void run() throws Exception {
        EventLoopGroup bossGroup = new NioEventLoopGroup(); // (1)
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try{
            ServerBootstrap b = new ServerBootstrap(); // (2)
            b.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class) // (3)
                .childHandler(new WebSocketChatServerInitializer()) // (4)
                .option(ChannelOption.SO_BACKLOG, 128) // (5)
                .childOption(ChannelOption.SO_KEEPALIVE,true); // (6)

            System.out.println("WebSocketChatServer 启动了");

            ChannelFuture f = b.bind(port).sync();
            f.channel().closeFuture().sync();
        }finally {
            workerGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();

            System.out.println("WebSocketChatServer 关闭了");
        }
    }

    public static void main(String[] args) throws Exception {
        int port;
        if(args.length > 0){
            port = Integer.parseInt(args[0]);
        }else {
            port = 8080;
        }
        new WebSocketChatServer(port).run();
    }
}
